Structure and reactivity of bimetallic Ni-Au catalysts for syngas production and utilization

Ya Huei Chin, David L. King, Yong Wang, Hyun Seog Roh

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A key issue regarding the use of Ni catalysts for hydrocarbon steam reforming is their stability against carbon deposition. This deposition can be retarded by addition of promoter atoms such as Au that are thought to reside at the coordinatively unsaturated step and kinks sites. We have characterized the structure of Au-promoted Ni catalysts and investigated their reactivity toward syngas production and consumption. XPS and chemisorption results suggest the formation of a surface Au-Ni alloy. Methane steam reforming shows an effect of Au surface alloying through a modest reduction in initial activity and deactivation rate. However, CO DRIFT and methanation studies show little effect of Au addition. These latter results are consistent with surface reconstruction in the presence of CO, which minimizes the impact of Au. This study points out the contrast in findings from different characterization methods, and emphasizes the importance of characterizing bimetallic catalysts under actual working conditions.

Original languageEnglish
Title of host publicationAbstracts of Papers - 232nd American Chemical Society Meeting and Exposition
Publication statusPublished - 2006 Dec 1
Event232nd American Chemical Society Meeting and Exposition - San Francisco, CA, United States
Duration: 2006 Sep 102006 Sep 14

Publication series

NameACS National Meeting Book of Abstracts
Volume232
ISSN (Print)0065-7727

Other

Other232nd American Chemical Society Meeting and Exposition
CountryUnited States
CitySan Francisco, CA
Period06/9/1006/9/14

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All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Chin, Y. H., King, D. L., Wang, Y., & Roh, H. S. (2006). Structure and reactivity of bimetallic Ni-Au catalysts for syngas production and utilization. In Abstracts of Papers - 232nd American Chemical Society Meeting and Exposition (ACS National Meeting Book of Abstracts; Vol. 232).